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Finding the Fourth Proportional to 208,718.82, 313,123.59 and 68,472.18

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Solution

The fourth proportional to 208,718.82, 313,123.59 and 68,472.18 is: 102,723.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,718.82 : 313,123.59 = 68,472.18 : x
  2. Step 2: Convert to fraction form
    208,718.82/313,123.59 = 68,472.18/x
  3. Step 3: Cross multiply
    208,718.82x = 313,123.59 × 68,472.18
  4. Step 4: Simplify right side
    208,718.82x = 21,440,254,816.73
  5. Step 5: Solve for x
    x = 21,440,254,816.73/208,718.82
  6. Step 6: Final answer
    x = 102,723.15

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.